256042235 has 4 divisors (see below), whose sum is σ = 307250688. Its totient is φ = 204833784.

The previous prime is 256042223. The next prime is 256042243. The reversal of 256042235 is 532240652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256042235 - 2⁸ = 256041979 is a prime.

It is a super-2 number, since 2×256042235² = 131115252207590450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256042198 and 256042207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25604219 + ... + 25604228.

It is an arithmetic number, because the mean of its divisors is an integer number (76812672).

Almost surely, 2^256042235 is an apocalyptic number.

256042235 is a deficient number, since it is larger than the sum of its proper divisors (51208453).

256042235 is an equidigital number, since it uses as much as digits as its factorization.

256042235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51208452.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 256042235 is about 16001.3197893174. The cubic root of 256042235 is about 634.9953375564.

Adding to 256042235 its reverse (532240652), we get a palindrome (788282887).

The spelling of 256042235 in words is "two hundred fifty-six million, forty-two thousand, two hundred thirty-five".